Smoke-consumer.



W. AGHESON. SMOKE CONSUMER. APPLmATIoN FILED 1mm, 1907.

2 SHEETS-SHEET 1.

Patented Dec. 28,

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w. AoHBsorL SMOKE CONSUMER. APPLICATION FILLD DBO. 7, 1907.

2 SHEETS-SHEET 2.

Patented 1m28, 1909.

anvenfor WLLIAM AGHESON. 0F PITTSBURG, PENNSYLVANIA.

suroKn-comsuiunn.

' specification of Letters Patent.

Patented Dee. 2s, 1909.

Application filed Becember 7, 1907. Serial No. 405,539.

To all lwhom it may concern.'

Be it known that I, WILLIAM 'AoHnsoN, a

i citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented new' and useful Improvements in Smoke-Consumers, of which the following is a specification.

, rlhis invention relates to smoke consumers. the object of the invention being to' provide effective means for romoting combustion in the lire chamber of) a furnace in a simple and effective manner whereby the smoke is consumed, the apparatus embodying means In the drawings 1 designates a steaml b 9 D boiler suitably mounted over a fire chamber 2 and having associated with one end thereofv the usual smoke stack 3.

In carrying out the present invention, I provide a suitable number of return lines a, 5 and 6, which at their upper ends merge into a` common neck 7 which enters the smoke stack as shown in Fig. 2 at a point above the base of the smoke stack 3. The lower ends of the return fines Lil, 5 and 6 are expanded hori'zontally, asl shown at 8 and fitted to correspondingly shaped return ports 9 which enter the fire chamber 2 above the fire. Just above the lane of the neck 7 a self-o Jenin@v gravit p 7 D D n closed cut-off or damper 10 is arranged in the smoke stack 3. This damper may beA of any suitable construction being shown as hinged at 11 to one side of the stack andl resting on a suitable cut off ledge or shoulder 12. The cut-off or damper 10 is held normally closed by gravity but` will readily open upward4 under pressure to allow the products of combustion to escape into and throu h the-stack.

13 vesignates a blast fan from which an air pipe 14- extends toward the stack and has an upwardly inclined discharge portion or nozzle 15 which passes through 'the sidewall lof the vstack and directs a blastof air upward along the bottom of the damper and directl into theneck'7. Another branch 16 leads o .from the blast pipe 14 and extending around one side of the stack 3, enters the top of the neck at a point 17 inline with the curve or bend 1S where the return iues 4, 5 and 6 join the neckso as to induce a still greater draftA than the one induced by the air discharged from the nozzle'15 into the stack. The blast pipe 14 is controlled by a gate or valve 19v and the branchpipe 16 is also controlled by a gate or valve 20 located therein, thus enabling the blast to be delivered either through the branch 15 or the branch 16 or simultaneously throughbotli branches.

21 designates a steam dome connected with the steam boiler at 22 and having a steam blast pipe 23 @which leads from the dome into the branch 1 5 of the air blast pipe 14, theobject being to deliver a jet or blastof steam into the air as the latter is discharged intothe stack, thereby increasing the current and strength of the blast and also heating the blast before it is distributed to the return flues 4, 5 and 6 and carried l back into the tire chamber above the nre.

From the foregoing description it will be understood that the products of combustion passing into the stack are caught up by the air blast or air and steam blasts combined and returned to the fire chamber, the additional supply of oxygen thus afforded promoting perfect combustion in the tire chamber, the gases in the stack mingling l with` the inrusliing air and thus producing j a mixture which will readily ignite immediately upon entering the tire chamber. By arranging to have the 'air and steam enter the stack and the neck of the return lines at different angles, the air, steam and gas are thoroughly' churned and mixed and then distributed over the lire.

`Where the invention hereinabove de- 'scribed is employed, it is unnecessary te useK any grate in the tire chamber thus enabling the bed on which the coals are burned to be made solid or composed of fire bric 11, as shown at 2li, the upper surface 'of the brick being preferably coated with salt and sand mixed in suitable proportions'to act as a heat retaining floor for the fire chamber.

25 designates a iexible connection having one end attached to the damper 10, said connection running over suitable pulleys 26 and extending down in front of the return flues rio within convenient reach of an operator standing at the front of the furnace Who may thereby open and close the damper as needed.

The damper may be slightly opened and allowed to remain so in order to provide for the Hnal escape of the consumed gases.

The combination with a stationary boiler furnace having a fire box, Hre bed and smoke stack at the same end thereof, of a U-shaped return Hue arranged Wholly at one end of the furnace and leading from the stack on an upward incline and then downward and enterin the fire box above the bed thereof,

t 'an inclmed self-opening gravity closed cutoH located in line with and forming" a portion of the upper side of the return Hue for opening and closing the stack at the point Where the return Hue intersects the stack, a blast fan, a plurality of air'pipes leading from said fan one arranged to deliver a current of air into the stack at the initial 'end of the Hue and another arranged to deliver a current of air into the return bend of said Hue beyond the stack, and a steam blast communicating with one of said air pipes in ad- Vance of the point Where said air pipe enters the return Hue.

In testimony whereof I aHix my signature in presence of two Witnesses.

WILLIAM ACHESON.

lVitnesses :I l

JAMES GILLEsPm, MORTIMER P. SULLIVAN. 

